/Engine/Plugins/Importers/USDImporter/Source/USDUtilities/Public/USDConversionUtils.h
Returns an empty path in case the layer doesn't have a spec for this prim.
namespace UsdUtils { [UE::FSdfPath](API\Plugins\UnrealUSDWrapper\UsdWrappers\FSdfPath) UsdUtils::GetPrimSpecPathForLayer ( const [UE::FUsdPrim](API\Plugins\UnrealUSDWrapper\UsdWrappers\FUsdPrim) & Prim, const [UE::FSdfLayer](API\Plugins\UnrealUSDWrapper\UsdWrappers\FSdfLayer) & Layer ) }